Island



(No Model.)

R. D. GLAPP.

DRILLING MACHINE.

INS/.ENTER- @125m MQW, d1

Uivrrnn STATES PATENT OFFICE.y

RICHARD DEXTER CLAPP, `OE BOSTON, MASSACHUSETTS, ASSIGNOR TO J. P. CARI.WEIS, OF` PROVIDENCE, RHODE ISLAND. l

DRILLINc-MACHINE.

SPECIFICATION forming part of Letters Patent No. 527,321, dated October9, 1894. Application filed December 29, 1892i `Serial No. 456,620. (Nomodel.)

To all whom t may concern:

Be it known that I, RICHARD IDEXTER CLAPP, of Boston, in the countyof-Suffolk and State of Massachusetts, have invented certain new anduseful Improvements in Drilling-Machines; and I hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, forming parttof thisspecication.

This invention has reference particularly to improvements in machinesfor drilling buttons.

The object of the invention is to produce a drilling-machine which maybe operated to successively present the drill opposite differ-` entportions ofthe article to be drilled.

The further object of the invention is to produce a drilling.- machineby which the blanks may be automatically presented to the l drill andremoved from the machine after blank is presented thereto.

The invention consists in the peculiar construction of the drillsupportand in the means for operating the same.

The invention also consists in the combination with the drilling-deviceof the blank presenting and removing mechanism, together with such otherpeculiar features of construction and combination of parts as willhereinafter be more fully described and pointed out in the claims.

Figure 1 represents an elevation of myimproved grinding machine, partlyin section, to show its construction and operation. Fig. 2 represents aplan view of the same. Fig. 3 represents an enlarged view, partly insection, to show the construction of the bearingsleeve for thedrillshaft and the pulley for rotating the same, together with the stopand latch for locating the drill and the means for operating the stopandlatch. Fig. l is a side view of these portions partly broken away.

Similar numbers and letters of reference designate corresponding partsthroughout.

In the drawings 6 indicates the base on which the machine is mounted.

i pins 11-11 are screwed.

` side of which extends a pin.

ypiece 16. vrear end, is a strap 2O between the ends of Y which thetriangular latch-plate 21 is pivoted, and between the ends of the strapis also se- 7 is a standard-bracket which is secured to the base 6 andhas, at its upper end, a tubular-bearing in which the sleeve S is freeto rotate. The forward end of this sleeve has Va shoulder 9 to preventthe backward movey ment thereof, and to the rear end is secured `theband-pulley 10 furnished in one face` with two or more sockets in whichthe stop- The sleeve 8 has a bore which is more or less 0E of theaxialcenter of the sleeve, and in this bore is journaled the drill-shaft12 having at the forward end the clutch 13 for holding `the drill andnear the rear end a driving-pulley 14. The distance at which theaxial-center of the shaft 12 is set oif from the axial-center of the.

sleeve 8 determines the distance from the center of the blank at whichthe drill is to operate.

The rear end of the drill-shaft l2 is furnished with a swivel bearing 15from each These pins are engaged in slots in the upper ends of theyoke-piece 16 which is pivoted to the base 6 y and is pressed backwardby a spring.

Pivoted to the rear standard of the bracket `7 is a stop-arm 17 havingafinger 18 which is continually pressed upward bya spring to throw thestop-arm over the face of the pull ley 10 to engage one of the stop-pins11-11 and prevent the rotation of the pulley and thesleeve 8.

The shaft 19 is free to reciprocate in suitable bearings and is pivotedto the yoke- Clamped to this shaft, near the plate is carried by thefinger 1S, the spring is.`

allowed to act to throw the stop-arm into position to engage the nextstop-pin `11 to again stop the rotation of the pulley while another holeis being drilled. On the forward move- IOO ' on which thedrilling-mechanism is located,

are secured the brackets 23 Ain bearings in which is journaled the shaft24 to one end of which is secured the drive-.pulley 25. Mounted on thisshaft is the drilling-cam 26 having a number of gradually-inclined steps27 which depends on the number of holes to be drilled in each blank.This end of the shaft 19 is curved to extend beneath the shaft 24 and ispivoted to the stop-arm 28 which is pivoted at its lower end to the base6 while its upper end bears against the face Yof the cam 26. Thethrust-cam 29 is Valso mounted on the shaft 24 and rotates therewith.One side of this cam is furnished with a pin 30 which at everyrevolution strikes the spring-arm 31 secured to the base 6 and bends thesame backward. The plunger 32 is partially contained within the case 33which is suitably supported and is thrust back against the face of thecam 29 by the coiled-spring 34, its reciprocation, therefore, beinggoverned by the conformation of the cam. At the forward end this plungerhas a socket to receive the end of the drill after it passes through theblank.

On the forward end of the casing 33 is secured the spring-chuck 35having a vertical slot in its upper portion and directly above this slotis mounted a chute 36 by which the blanks are fed to the machine.Extending from this chute is an arm 37, to the `end of which is pivotedthe member 38, the upper end of the member being furnished with thepivoted-pins 39 surrounded by coiled-springs for `forcing this end ofthe member a'way from the chute. The lower end of the member is alsofurnished with pivoted-pins 40 and is connected by. the wire 41 with theupper end 0f the spring-arm 31. In operation the pins 39 and 40 arealternately thrust forward through perforations in the chute to regulatethe movement of the blanks.

Located directly in front of the chuck 35 and having an orifice intowhich the end of the chuck extends is a removing-chute 42 which has aperforation 43 in the wall opposite to that into which the chuckextends, this perforation being sufciently large to allow the revolutionof the 'drill in the circle in which the holes are to be drilled, butstill small enough to prevent the egress of the blank when, at thefinish of the drilling, it is kicked from the chuck by the shoulder A ofthe cam 29 passing on the end of the plunger 32.

.As the shaft 24 is rotated the shaft 19 will be drawn forward by thestop 28 riding over the cam-steps 27, and as the end of each of thesesteps is reached by the head of the stbp the spring-operated arm 16 willbe allowed to act to draw the shaft 19 as well as the drillshaft 12 backinto place. .At the vsame time the vpulley 10 will be released from thestoparm17 and will be rotated by its loose belt unt-il this arm engagesthe next stop-pin, this reciprocation of the drill-shaft being continueduntil the predetermined number of holes have been drilled. The blankwill then be thrown into the chute 42 and the plunger 32 will recede tothe position shown in Fig. 1 of the drawings ready to be moved forwardby the cam. 29 to present another blank between the endsof the chuck andto hold it there while being drilled.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. n a drilling-machine, in combination, a

rotatable-bearing journaled in a frame, a ro- 3. In a drilling-machine,the combination with a rotatable -bearingg'a driving pulley mountedthereon, a drill-shaft eccentrically journaled therein and free toreciprocate independently thereof, of a pivoted-bar adaptedv toreciprocate said drill-shaft,I and a cam-controlled shaft adapted tovibrate said bar, as described. i l

4. In a drilling-machine, the combination with a plungercase, a chuckhaving an entrance-slot mounted thereon, a spring-plunger free toreciprocate therein, and a cam mounted on a shaft for operating theplunger against the spring, of a removal-chute 42 having the perforation43 and located immediately in front of the chuck, as described.

5. The combination with a frame, the sleeve-bearing 8 j ournaledtherein, the pulleywheel 10 secured to said sleeve and furnished withstop-pins, the drill-shaft 12 having the pulley 14 eccentricallyjournaled in said sleeve and free to reciprocate therein, the

swivel-bearing 15 mounted on the end of the drill-shaft, thespring-operated piVoted-arm 16 engaging this bearing, and thespring-operated stop-arm 17 having the finger 18 pivoted to the frame,of the shaft 19 pivoted to the arm 16 and to the pivoted stop-arm '28,the strap 2O clamped to the shaft 19 and carrying the pivoted-pawl 21,and a cam 26 mounted on a shaft and having steps as 27 for operating thearm 28, as described.

In witness whereof l have hereunto set my hand.

R. DEXTER CLAPP.

Witnesses:

HENRY J. MILLER, M. F. BLIGH.

